Dan Nelson wrote:
>In the last episode (Oct 03), Angelo Zanetti said:
>
>
>>I've got a database that has a few thousand rows, I've noticed that
>>some of the search queries (especially the large ones) are taking
>>some time. Im looking at adding indexes to my tables in order to
>>speed up the data retrieval.
>>
>>My question is as follows: At this point in time if I add the indexes
>>to the various tables should I see immediate results in the query
>>times or do I have to wait for new information to enter the database
>>(only new data gets indexed?)
>>
>>When does the data actually get indexed? Is it when its inserted or
>>continually when regards are inserted or updated in the database?
>>
>>
>
>When you add an index, Mysql builds a complete index of your table
>immediately. For a few thousand rows it should take under a minute.
>The index will automatically be updated as you insert rows or change
>existing ones.
>
>
>
thanks Dan and Dan.
I will have a look at the mysql site. However I checked and there are
600 rows approx in the database.
The query im running has 3 subselect statements and takes quite a while,
would you say that indexing wouldn't help as there arent that many rows
in the database currently? And therefore consider rewriting parts of the
statement?
I will add the indexes as good measuse anyway.
TIA
--
------------------------------------------------------------------------
Angelo Zanetti
Systems developer
------------------------------------------------------------------------
*Telephone:* +27 (021) 469 1052
*Mobile:* +27 (0) 72 441 3355
*Fax:* +27 (0) 86 681 5885
*
Web:* http://www.zlogic.co.za
*E-Mail:* angelo@stripped <mailto:angelo@stripped>

Content reproduced on this site is the property of the respective copyright holders. It is not reviewed in advance by Oracle and does not necessarily represent the opinion of Oracle or any other party.